1 files changed, 25 insertions, 18 deletions

diff --git a/src/helper.js b/src/helper.js
index 2242d91..3a4cca0 100644
--- a/src/helper.js
+++ b/src/helper.js
@@ -45,23 +45,30 @@ function formatInt(num) {
     return ("00" + num).slice(-2)
 }
 
-export function calcCrow(lat1, lon1, lat2, lon2) 
-    {
-      var R = 6371; // km
-      var dLat = toRad(lat2-lat1);
-      var dLon = toRad(lon2-lon1);
-      var lat1 = toRad(lat1);
-      var lat2 = toRad(lat2);
+export function calcCrow(lat1, lon1, lat2, lon2) {
+    var R = 6371; // km
+    var dLat = toRad(lat2 - lat1);
+    var dLon = toRad(lon2 - lon1);
+    var lat1 = toRad(lat1);
+    var lat2 = toRad(lat2);
 
-      var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
-        Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2); 
-      var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
-      var d = R * c;
-      return d;
-    }
+    var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
+        Math.sin(dLon / 2) * Math.sin(dLon / 2) * Math.cos(lat1) * Math.cos(lat2);
+    var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+    var d = R * c;
+    return d;
+}
+
+// Converts numeric degrees to radians
+function toRad(Value) {
+    return Value * Math.PI / 180;
+}
 
-    // Converts numeric degrees to radians
-    function toRad(Value) 
-    {
-        return Value * Math.PI / 180;
-    }
\ No newline at end of file
+export default function debounce(func, wait) {
+    let timeout
+    return function (...args) {
+        const context = this
+        clearTimeout(timeout)
+        timeout = setTimeout(() => func.apply(context, args), wait)
+    }
+}